SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6013abf19230d237e5b817ff376839801d61b713039304967c7214a762ac5af2' 
  AND token = 'dlEn/0Gsi8F+caPLoBxJVYUYyfoFgdS77u5UKsgRJ9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}